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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Adding olivetti to GNU ELPA
Date: Wed, 08 May 2019 20:50:18 +0300
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To: Stephen Leake <stephen_leake@stephe-leake.org>
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In-reply-to: <86o94d54sf.fsf@stephe-leake.org> (message from Stephen Leake on
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> From: Stephen Leake <stephen_leake@stephe-leake.org>
> Date: Wed, 08 May 2019 07:45:04 -0800
> 
> you can use the variables emacs-version (a string), emacs-major-version
> (an integer), emacs-minor-version (an integer).
> 
> Something like:
> 
> (cl-ecase emacs-major-version
> (23
>     (add-hook ...)
>     )
> 
> (24
>     (add-hook ...)

We have version-comparison functions in subr.el.